CN100550817C - Realize the Digital Subscriber Line Access Multiplexer and the data transmission method thereof of multicast bandwidth expansion - Google Patents
Realize the Digital Subscriber Line Access Multiplexer and the data transmission method thereof of multicast bandwidth expansion Download PDFInfo
- Publication number
- CN100550817C CN100550817C CNB200410005710XA CN200410005710A CN100550817C CN 100550817 C CN100550817 C CN 100550817C CN B200410005710X A CNB200410005710X A CN B200410005710XA CN 200410005710 A CN200410005710 A CN 200410005710A CN 100550817 C CN100550817 C CN 100550817C
- Authority
- CN
- China
- Prior art keywords
- data
- bus
- multicast
- master control
- dslam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2385—Channel allocation; Bandwidth allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/64—Addressing
- H04N21/6405—Multicasting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
Abstract
The present invention relates to a kind of DSLAM and data transmission method thereof of realizing the multicast bandwidth expansion.The present invention increases a video distribution bus that is specifically designed to transmitting video data on the basis of the data/address bus of original master control borad and user board in DSLAM (Digital Subscriber Line Access Multiplexer) again, and be responsible for the flowing through transmission process of data of DSLAM of the original data/address bus of DSLAM.The invention solves the DSLAM that exists in the prior art and can't satisfy the problem of video multicast bandwidth demand.Realization of the present invention makes DSLAM can realize the expansion of backboard multicast bandwidth with lower cost, satisfies corresponding video multicast bandwidth demand.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of DSLAM and data transmission method thereof of realizing the multicast bandwidth expansion.
Background technology
The group broadcasting video frequency business has more and more become the necessary business on a kind of broadband network; and described group broadcasting video frequency is professional realizes that based on network model shown in Figure 1 the group broadcasting video frequency network of Fig. 1 comprises video headend shall system, IP metropolitan area network, broadband access network and four parts of home network usually.
Described video headend shall system realizes video user management, CA/DRM (ConditionalAcess/Digital Register Management, access permission and digital registration management), video coding function, then video traffic is sent into the IP metropolitan area network.Each TV (TV) and broadcasting channel adopt MPEG-2 (a kind of image and voice compression standard) to be encoded into one road code stream and are encapsulated in UDP/IP (User Datagram Protoco (UDP)/Internet protocol) message.The bandwidth of each multicast channel can be from 1M to 4M, and the demand bandwidth of HDTV (high definition TV) in the future even up to about 7M may have video channel more than 200 provides multiple amusement for the user selection in the general networking.
The IP metropolitan area network is delivered to broadband access network by the IP multicast functionality with video traffic, and corresponding video frequency program arrives DSLAM equipment by transmitting network again, and DSLAM copies to user port with this video traffic, thereby guarantees that the user receives corresponding video frequency program.
Along with a large amount of video frequency program development, bandwidth demand to the DSLAM device interior is had higher requirement, bandwidth demand with 200 channels is an example, suppose that each channel is 4M, like this, just there has been the requirement up to the multicast bandwidth of 800-1G in system, is that 800-1G can be to satisfy the demand of corresponding video traffic with regard to the multicast bandwidth that requires DSLAM also.
At present, the DSLAM access device can be divided into two kinds, the broadband access equipment of frame and the broadband access equipment of boxlike, and two kinds of equipment are formed by three parts usually: master control borad, user board, backboard.Master control borad provides the controlled function of system, the processing distribution of data flow and the function that converges, uplink network side interface etc.; The DSLAM access device generally has two master control borads, and the masterslave switchover function is provided; User board externally provides user's access interface, different user boards provides different access waies, can be a kind of among ADSL (ADSL (Asymmetric Digital Subscriber Line)), VDSL (very-high-bit-rate digital subscriber loop wire), Ethernet, the G.shdsl etc., general DSLAM system can provide a plurality of user boards simultaneously, every user board can provide the user interface of some, can provide 32 tunnel or 48 tunnel even 64 road interfaces as the ADSL plate; Backboard provides the connection between master control borad and the user board, and master control borad and user board all are fixed on the groove position of backboard, and the data that backboard also provides data/address bus to be used between master control borad and user board transmit.As shown in Figure 1, adopt the star bus connected mode among the figure, can certainly adopt other bus connecting modes.
On the function of processing multicast service, master control borad at first can be on the data/address bus that group broadcasting video frequency program copies to each user board links to each other, and user board receives described video frequency program then, sends to corresponding user side again.
Present master control borad generally is made up of two parts: control module and data processing module; User board is also mainly formed (such as adsl interface plate, VDSL interface board etc.) by two parts: data processing module and control module if by the master control borad centralized control, may not have control module on the user board so yet.
At present, owing to have only a cover to be used for the data/address bus of master control borad and user interface communication between plates on the backboard, the data video frequency program that duplicates of master control borad and the user program of surfing the Net will be sent to user board in same set of bus like this.In the DSLAM system, generally adopt master control borad to FE bus star-like between the user board as data/address bus.Provide under the situation of 64 road adsl interfaces at a user board, the user of each port can appreciate two group broadcasting video frequency programs, if 64 adsl interfaces are the different video frequency program of program request all, from the master control borad to the user board, need support the transmission of 128 video frequency programs so, if each video frequency program 4Mbits/s, at least be the bandwidth demand of 512Mbits/s to the connection bandwidth demand between master control borad and the interface board so, and data channel bandwidth altogether is FE100Mbits/s at present, can't satisfy the bandwidth demand of video multicast at all, therefore, existing DSLAM system can't support the support to video traffic.
Summary of the invention
The purpose of this invention is to provide a kind of DSLAM and data transmission method thereof of realizing the multicast bandwidth expansion,, thereby make DSLAM can support more multicast channel number with the expansion of realization at multicast bandwidth.
The objective of the invention is to be achieved through the following technical solutions:
Described a kind of Digital Subscriber Line Access Multiplexer DSLAM that realizes the multicast bandwidth expansion, its structure comprises master control borad, user board and data/address bus, link to each other by data/address bus between master control borad and user board, and also increase between described master control borad and user board and be provided with video distribution bus and multicast distribution device module, and when master control borad judges that according to the information of Data-carrying described data are the group broadcasting video frequency data, described multicast distribution device module sends to the group broadcasting video frequency data on the video distribution bus by broadcasting or multicast mode, adopts the described data of described video distribution bus transfer.
Described master control borad links to each other with user board by multicast distribution device, video distribution bus successively; The single group broadcasting video frequency data that are input as the data processing module output in the master control borad of described multicast distribution device, described multicast distribution device are output as the group broadcasting video frequency data or the broadcasting video data stream of multichannel.
Described data/address bus is Fast Ethernet FE bus, gigabit Ethernet GE bus or cell bus.
Described video distribution bus is unidirectional data/address bus.
Described video distribution bus is shared bus or point-to-point star bus.
Described video distribution bus is GE bus or cell bus.
Described video distribution bus is one or more bus.
A kind of realization multicast bandwidth expanded data transmission method of the present invention comprises:
Master control borad in A, the Digital Subscriber Line Access Multiplexer receives the data that network terminal sends, and judges whether to send to for needs the group broadcasting video frequency data of user board;
B, if described data are the group broadcasting video frequency data, then master control borad by the video distribution bus, adopts broadcasting or multicast mode with described group broadcasting video frequency data, sends to user board;
C, user board receive the group broadcasting video frequency data from the video distribution bus, and described group broadcasting video frequency data are copied to user port.
Described step B comprises: if described data are not the group broadcasting video frequency data, then described data are sent to user board by original data/address bus.
Described step B comprises:
Master control borad sends to single group broadcasting video frequency data described group broadcasting video frequency data on the video distribution bus by broadcasting or multicast mode by the multicast distribution device, and sends to user board.
Described step B also comprises:
User board receives that from the group broadcasting video frequency bus interface non-group broadcasting video frequency data make discard processing;
User board all sends master control borad to by original data/address bus from all data that user side receives.
As seen from the above technical solution provided by the invention, the present invention is owing to adopted on the basis of the data/address bus of original master control borad and user board in DSLAM and increased a video distribution bus that is specifically designed to transmitting video data again, therefore, solved the problem that the DSLAM that exists in the prior art can't satisfy the video multicast bandwidth demand.Realization of the present invention makes DSLAM can realize the expansion of multicast bandwidth with lower cost, satisfies corresponding video multicast bandwidth demand.
Realization of the present invention, from bandwidth, adopt the bandwidth of independent star bus type can be up to 1.25G, the multicast channel number can support more than 300, and the price of the multicast distribution device Repeater (reproducer) that adopts of the present invention or MUX (multiplexer) is far below the exchange chip of full GE; Adopt the bandwidth of independent shared bus also can also can support the high-bandwidth video program more than 240, realize that cost is also most suitable up to more than the 1.2G.
Description of drawings
Fig. 1 is the schematic diagram of group broadcasting video frequency network;
Fig. 2 is the structural representation of existing DSLAM;
Fig. 3 is the syndeton schematic diagram between existing user board and master control borad;
Fig. 4 is the structural representation of the DSLAM among the present invention;
Fig. 5 is the syndeton schematic diagram 1 between user board among the present invention and master control borad;
Fig. 6 is the syndeton schematic diagram 2 between user board among the present invention and master control borad.
Embodiment
Core of the present invention is the service feature according to video multicast, has made up a video distribution bus on the backboard of DSLAM, is specifically designed to the transmission of master control borad to the video data of user board, thereby video channel and traditional data channel are separated; The present invention has realized the expansion of Gbps by the video distribution bus.
The structure of the DSLAM of realization multicast bandwidth expansion of the present invention as shown in Figure 4, master control borad and user board are all seen in the groove position that is plugged in backboard, and by data/address bus and the connection of video distribution bus, heavy line shown on the figure dorsulum is the video distribution bus, the bus that increases newly for the present invention, be used between master control borad and user board, carrying out the transmission of video data service, can be GE bus or cell bus etc., fine line is a data/address bus, be the original bus of DSLAM, be used for carrying out between master control borad and user board the transmission of other data services except that video data service, data/address bus can be the FE bus, GE bus or the like; Described video distribution bus is the data/address bus of one group of one-way transmission, the direction that data transmit only is from the master control borad to the user board, the video multicast data that are used for master control borad is received send to user board, the video distribution bus can adopt the star bus connected mode, also can adopt the broadcast bus of sharing formula.Among the present invention, the expansion of the multicast bandwidth that is arranged so that DSLAM of newly-increased video distribution bus is more convenient easily, and cost is lower.
Among the present invention, newly-increased video distribution bus can be one, also can be many, when if described video distribution bus is many, then also needing on the data processing module of master control borad increases corresponding processing capacity, thereby is convenient in the transmission course of video traffic to select idle or suitable video distribution bus is carried out the transmission of video data service.
When the video distribution bus among the present invention adopts the mode of star bus to realize, its implementation structure as shown in Figure 5, outgoing position at the data processing module of original master control borad increases a multicast distribution device module 100 (being corresponding bus interface module), and link to each other with each user board by star bus, the function of multicast distribution device module 100 is that single multicast data flow is delivered on the video bus by broadcasting or multicast mode, re-send on each user board, multicast distribution device module under the star bus mode is one the one copy function module of advancing to have more, and the output interface number of this module equals the number of user board.In the star bus connected mode, described video distribution bus can be selected LVDS (Low Voltage Differential Signal, Low Voltage Differential Signal) bus or selection GE (gigabit Ethernet) bus, corresponding multicast distribution device module just can be selected Repeater (reproducer) device of LVDS or select GE Mux (GE multiplexer) device, thereby realizes the multicast traffic stream of master control borad is broadcast to user board.The present invention also needs to expand the interface of the group broadcasting video frequency distribution bus that provides on the data processing module of user board, accept issuing of video data stream, copies to the user of terminal then.
When the video distribution bus among the present invention adopts the mode of shared bus to realize, its implementation structure as shown in Figure 6, increase the multicast distribution device module 100 (being corresponding bus interface module) of a shared bus interface at the outgoing position of the data processing module of original master control borad, and link to each other with each user board by shared bus, the function of the multicast distribution device module 100 under the shared bus mode is that single multicast data flow is sent to shared bus, because this bus is to share formula, so can be sent to each user board on backboard; User board is responsible for selecting the data of the group broadcasting program that own user added, and copies to corresponding user port then.The multicast distribution device module of this moment is one one bus interface module that goes out, shared bus can be selected Cell Bus (cell bus, a kind of data/address bus based on fixed length unit) bus or simplification only provide the Cell Bus of sending function, perhaps select Utopia bus (a kind of atm interface bus) etc., at this time the multicast distribution device can be selected the bus interface device of Cell Bus, thereby realizes that multicast traffic stream is broadcast to user board.Expansion provides the interface of group broadcasting video frequency distribution bus on the data processing module of user board, accepts issuing of video data stream, copies to the user, sends to user port together with common data then.
More than the difference of two schemes be that the data processing module of user board under the star-like connected mode need provide two video distribution bus interface and two master control borads to join, and described video data service needs to transmit many parts on backboard, sends to different user boards respectively; And the data processing module of user board only need provide a video distribution bus interface under the shared bus type mode, and only can transmit a broadcasting video data stream on the backboard and can guarantee that just each user board receives corresponding video data service exactly.
The DSLAM of the realization multicast bandwidth expansion that provides based on the invention described above, the present invention also provides a kind of method of corresponding transfer of data, and the concrete processing procedure of this method is as follows:
Step 1: behind the master control borad receiving data stream, judge according to the data flow loaded information whether described data are the group broadcasting video frequency data flow, if then execution in step 2, otherwise, execution in step 3;
Step 2: described group broadcasting video frequency data flow is sent to user board by multicast distribution device module, video distribution bus successively, and execution in step 4;
For the connected mode of star-like video distribution bus, described multicast distribution device module need be many parts with described group broadcasting video frequency data flow replication and send to the video distribution bus that links to each other with each user board respectively, and be received by corresponding user board;
For shared video distribution bus, then described multicast distribution device module need be with the direct broadcast transmission of described group broadcasting video frequency data flow on shared video distribution bus, and is received by corresponding user board;
By this step as can be seen, as long as select suitable bus bandwidth, just can satisfy the bandwidth demand of corresponding video multicast;
Step 3: described data flow (comprising common clear data and non-group broadcasting video frequency data) is sent to user board by the original data/address bus of DSLAM, and execution in step 4;
Step 4: the data processing module in the user board receives described data flow (comprising common clear data, non-group broadcasting video frequency data and group broadcasting video frequency data), and sends to the relevant terminal user;
As shown in Figure 1, send to each terminal use, as STB (set-top box), TV (TV), PC (main frame) etc. by CPE (user side terminal);
In this step, receive that from the group broadcasting video frequency bus interface non-group broadcasting video frequency data then can make discard processing for user board.
In addition, user board all sends master control borad to by original data/address bus from all data that user side receives among the present invention.
Video distribution bus newly-increased among the present invention can be selected to use according to the demand of DSLAM multicast bandwidth, uses cell bus or GE bus etc. as selecting, thereby can carry out the expansion of multicast bandwidth easily, to satisfy the demand of multicast bandwidth different in the network.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (11)
1, a kind of Digital Subscriber Line Access Multiplexer DSLAM that realizes the multicast bandwidth expansion, its structure comprises master control borad, user board and data/address bus, link to each other by data/address bus between master control borad and user board, it is characterized in that also increasing between described master control borad and user board and be provided with video distribution bus and multicast distribution device module, and when master control borad judges that according to the information of Data-carrying described data are the group broadcasting video frequency data, described multicast distribution device module sends to the group broadcasting video frequency data on the video distribution bus by broadcasting or multicast mode, adopts the described data of described video distribution bus transfer.
2, the DSLAM of realization multicast bandwidth expansion according to claim 1 is characterized in that described master control borad links to each other with user board by multicast distribution device, video distribution bus successively; The single group broadcasting video frequency data that are input as the data processing module output in the master control borad of described multicast distribution device, described multicast distribution device are output as the group broadcasting video frequency data or the broadcasting video data stream of multichannel.
3, the DSLAM of realization multicast bandwidth expansion according to claim 1 is characterized in that described data/address bus is Fast Ethernet FE bus, gigabit Ethernet GE bus or cell bus.
4, the DSLAM of realization multicast bandwidth expansion according to claim 1 is characterized in that described video distribution bus is unidirectional data/address bus.
5, according to the DSLAM of claim 1 or 4 described realization multicast bandwidth expansions, it is characterized in that described video distribution bus is shared bus or point-to-point star bus.
6, the DSLAM of realization multicast bandwidth expansion according to claim 5 is characterized in that described video distribution bus is GE bus or cell bus.
7, the DSLAM of realization multicast bandwidth expansion according to claim 1 is characterized in that described video distribution bus is one or more bus.
8, a kind of realization multicast bandwidth expanded data transmission method is characterized in that comprising:
Master control borad in A, the Digital Subscriber Line Access Multiplexer receives the data that network terminal sends, and judges whether to send to for needs the group broadcasting video frequency data of user board;
B, if described data are the group broadcasting video frequency data, then master control borad by the video distribution bus, adopts broadcasting or multicast mode with described group broadcasting video frequency data, sends to user board;
C, user board receive the group broadcasting video frequency data from the video distribution bus, and described group broadcasting video frequency data are copied to user port.
9, data transmission method according to claim 8 is characterized in that described step B comprises: if described data are not the group broadcasting video frequency data, then described data are sent to user board by original data/address bus.
10, data transmission method according to claim 9 is characterized in that described step B comprises:
Master control borad sends to single group broadcasting video frequency data described group broadcasting video frequency data on the video distribution bus by broadcasting or multicast mode by the multicast distribution device, and sends to user board.
11, data transmission method according to claim 10 is characterized in that described step B also comprises:
User board receives that from the group broadcasting video frequency bus interface non-group broadcasting video frequency data make discard processing;
User board all sends master control borad to by original data/address bus from all data that user side receives.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410005710XA CN100550817C (en) | 2004-02-15 | 2004-02-15 | Realize the Digital Subscriber Line Access Multiplexer and the data transmission method thereof of multicast bandwidth expansion |
| US10/585,798 US20080043772A1 (en) | 2004-02-15 | 2005-01-21 | Digital Subscriber Line Access Multiplexer and Data Transmission Method for Achieving the Multicast Bandwidth Expansion |
| PCT/CN2005/000094 WO2005081462A1 (en) | 2004-02-15 | 2005-01-21 | Digital subscriber line access multiplexer and data transmission method for achieving the multicast bandwidth expansion |
| EP05700468A EP1701480A4 (en) | 2004-02-15 | 2005-01-21 | Digital subscriber line access multiplexer and data transmission method for achieving the multicast bandwidth expansion |
| ARP050100481A AR047542A1 (en) | 2004-02-15 | 2005-02-10 | A DIGITAL SUBSCRIBER LINE ACCESS MULTIPLEXER EXPANDED ON THE BANDWIDTH FOR VIDEO SERVICE MULTIDIFFUSION AND TRANSMISSION METHOD. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410005710XA CN100550817C (en) | 2004-02-15 | 2004-02-15 | Realize the Digital Subscriber Line Access Multiplexer and the data transmission method thereof of multicast bandwidth expansion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1655529A CN1655529A (en) | 2005-08-17 |
| CN100550817C true CN100550817C (en) | 2009-10-14 |
Family
ID=34867669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410005710XA Expired - Fee Related CN100550817C (en) | 2004-02-15 | 2004-02-15 | Realize the Digital Subscriber Line Access Multiplexer and the data transmission method thereof of multicast bandwidth expansion |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20080043772A1 (en) |
| EP (1) | EP1701480A4 (en) |
| CN (1) | CN100550817C (en) |
| AR (1) | AR047542A1 (en) |
| WO (1) | WO2005081462A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101512988B (en) | 2006-09-18 | 2012-02-15 | 艾利森电话股份有限公司 | Correlative method and apparatus with permission control of wideband service |
| CN102438008B (en) * | 2007-01-26 | 2016-06-22 | 日本电气株式会社 | Video distribution system and method for video distribution |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU685098B2 (en) * | 1993-04-16 | 1998-01-15 | Media 100 Inc. | Video peripheral for a computer |
| US5608447A (en) * | 1994-05-27 | 1997-03-04 | Bell Atlantic | Full service network |
| FR2735318B1 (en) * | 1995-06-08 | 1997-07-18 | Thomson Broadcast Systems | CENTRALIZED SINGLE MEMORY ARCHITECTURE FOR TRANSFERRING VIDEO IMAGES |
| UA56279C2 (en) * | 1997-11-04 | 2003-05-15 | Джорджія Тек Ресерч Корпорейшн | System and method for maintaining time synchronization in a digital video network |
| US6480487B1 (en) * | 1998-08-24 | 2002-11-12 | Verizon Services Group | Digital loop carrier remote terminal having integrated digital subscriber plug-in line cards for multiplexing of telephone and broadband signals |
| US6940856B2 (en) * | 2001-03-05 | 2005-09-06 | International Business Machines Corporation | Multicast buffered switch and method for operating a multicast buffered switch |
| IL142378A0 (en) * | 2001-04-02 | 2002-03-10 | Jtc 2000 Dev Delaware Inc | Adsl access multiplexer |
| KR100418395B1 (en) * | 2001-11-29 | 2004-02-14 | 삼성전자주식회사 | Multi Digital Subscriber Line Access Multiplexor System |
| CN1170232C (en) * | 2002-10-16 | 2004-10-06 | 西安交通大学 | Machine vision system based on PCI and vision bus and capable of being reconfigurated |
-
2004
- 2004-02-15 CN CNB200410005710XA patent/CN100550817C/en not_active Expired - Fee Related
-
2005
- 2005-01-21 WO PCT/CN2005/000094 patent/WO2005081462A1/en active Application Filing
- 2005-01-21 EP EP05700468A patent/EP1701480A4/en not_active Withdrawn
- 2005-01-21 US US10/585,798 patent/US20080043772A1/en not_active Abandoned
- 2005-02-10 AR ARP050100481A patent/AR047542A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005081462A1 (en) | 2005-09-01 |
| CN1655529A (en) | 2005-08-17 |
| US20080043772A1 (en) | 2008-02-21 |
| AR047542A1 (en) | 2006-01-25 |
| EP1701480A4 (en) | 2009-11-11 |
| EP1701480A1 (en) | 2006-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7664053B2 (en) | Method and system for implementing multicast using slave block in digital subscriber line access technique | |
| EP1404057B1 (en) | A distributed cable modem termination system (CMTS) architecture implementing a MAC chip | |
| US7720101B2 (en) | Wideband cable modem with narrowband circuitry | |
| EP1394991B1 (en) | A distributed cable modem termination system (CMTS) architecture | |
| EP1394990B1 (en) | A miniMAC implementation of a distributed cable modem termination system (CMTS) architecture | |
| KR100670888B1 (en) | Multicast information delivery system and multicast information delivery method | |
| CN1110928C (en) | Multimedia distribution network including video switch | |
| US7489684B2 (en) | Access network architecture for multicasting using xDSL and IGMP | |
| JP2004500777A (en) | System and method for delivering information over a communication network | |
| JP2002531001A (en) | Logical node identification in information transmission networks | |
| CN101325650B (en) | Sound-video receiving equipment capable of being compatible (with) a plurality of access modes | |
| CN100550817C (en) | Realize the Digital Subscriber Line Access Multiplexer and the data transmission method thereof of multicast bandwidth expansion | |
| JP5329320B2 (en) | Packet relay apparatus and multicast packet relay method | |
| US20050083440A1 (en) | Broadcasting service providing system using the point to multi-point connection in ATM network and method therof | |
| EP0719066A2 (en) | Device and method for the management of multicast calls for broadcast audio and video services in a local ATM node | |
| EP1394989B1 (en) | A distributed cable modem termination system (CMTS) architecture implementing a media access control chip | |
| CN100358319C (en) | Method and system for realizing data-message transmission | |
| US20060039375A1 (en) | Method, communication system and communication device for trainsmitting broadcasting information via a communication network | |
| KR100893045B1 (en) | Broadcasting service providing system and method using the point to multi-point connection in ATM network | |
| KR100223657B1 (en) | Apparatus and method of teansmitting and receiving control imformation among telephone station and network system of vod service | |
| CN101083612A (en) | Method and apparatus for filtrating program source | |
| CN1448027A (en) | Capacity scaling and functional element redistribution within in-building coax cable internet access system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20190215 |